Backup Migration <= 2.1.6 — Authenticated (Administrator+) Privilege Escalation
CVE-2026-18216Published · Updated Action summary
Affected: ≤2.1.6Update to 2.1.7 or newer
All remediation steps- Severity
- Medium4.7
- CVSS
- 4.7CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:LWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:HPrivileges required- High
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:LIntegrity- Low
A:LAvailability- Low
- Weakness
- CWE-269 Privilege Escalation
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Backup Migration backup-backup
- Affected≤ 2.1.6
- Patched in2.1.7
Update to 2.1.7 or newer.
You are affected if you run ≤ 2.1.6. Version 2.1.7 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Backup Migration.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 2.1.7, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Backup Migration to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Thanh Lam Tang.
The Backup Migration plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 2.1.6. This is due to insufficient restriction on the capabilities a user may grant themselves. This makes it possible for authenticated attackers, with administrator-level access and above, to elevate their privileges beyond those intended for their role.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Backup Migration
All 19| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Authenticated (Administrator+) OS Command Injection via 'file' Parameter ≤2.1.1Update to 2.1.5.2 | CVE-2026-7693 | |
| Medium5.3 | Unauthenticated Information Exposure ≤2.1.1Update to 2.1.2 | CVE-2026-39480 | |
| Medium5.3 | Missing Authorization to Unauthenticated Backup Upload to Offline Storage ≤2.0.0Update to 2.1.0 | CVE-2025-14944 | |
| High7.5 | Information Exposure to Unauthenticated Back-up Download ≤1.4.9Update to 2.0.0 | CVE-2025-12394 | |
| High8.8 | Unauthenticated PHP Object Injection via 'recursive_unserialize_replace' ≤1.4.6Update to 1.4.6.1 | CVE-2024-10932 |
- High7.2Authenticated (Administrator+) OS Command Injection via 'file' Parameter
≤2.1.1Update to 2.1.5.2
- Medium5.3Unauthenticated Information Exposure
≤2.1.1Update to 2.1.2
- Medium5.3Missing Authorization to Unauthenticated Backup Upload to Offline Storage
≤2.0.0Update to 2.1.0
- High7.5Information Exposure to Unauthenticated Back-up Download
≤1.4.9Update to 2.0.0
- High8.8Unauthenticated PHP Object Injection via 'recursive_unserialize_replace'
≤1.4.6Update to 1.4.6.1
Same weakness (Privilege Escalation)
All Privilege Escalation| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 4.7
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.